#include<stdio.h>
#include<unistd.h>

int main()
{
    pid_t id = fork();
    if(id == 0)
    {
        //child
        while(1)
        {
            printf("I am child process, pid:%d, ppid: %d\n", getpid(), getppid());
            sleep(1);
        }
    }
    else if(id > 0)
    {
        //father
        int cnt = 5;
        while(cnt--)
        {
            printf("I am father process, pid:%d, ppid: %d\n", getpid(), getppid());
            sleep(1);
        }
    }
    return 0;
}
